77135744149 has 2 divisors, whose sum is σ = 77135744150. Its totient is φ = 77135744148.

The previous prime is 77135744143. The next prime is 77135744159. The reversal of 77135744149 is 94144753177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61136024049 + 15999720100 = 247257^2 + 126490^2 .

It is an emirp because it is prime and its reverse (94144753177) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77135744149 - 2¹⁵ = 77135711381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77135744096 and 77135744105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77135744143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38567872074 + 38567872075.

It is an arithmetic number, because the mean of its divisors is an integer number (38567872075).

Almost surely, 2^77135744149 is an apocalyptic number.

It is an amenable number.

77135744149 is a deficient number, since it is larger than the sum of its proper divisors (1).

77135744149 is an equidigital number, since it uses as much as digits as its factorization.

77135744149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 52.

The spelling of 77135744149 in words is "seventy-seven billion, one hundred thirty-five million, seven hundred forty-four thousand, one hundred forty-nine".